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A / B = Y Y x C = height
Walk a distance away from the obstacle you wish to measure. The greater the distance the more accurate your measurements will be. We call this distance A.
A second person step back a distance B and puts his hand on the ground.
The first person lies down on the ground while he looks to the point to be measured. The second person raises his hand until eye, hand and point aligne. The distance from ground to hand we call distance C.
Example:
A=50 mtr
B=1 mtr
C seems to be 45cm
50 / 1 = 50
50 x 45cm = 2250 cm = 22,50 mtr |
Sometimes it is necessary to determine the height of something. This is the height measurement.